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 ###Instrução: Qual local possui um indicativo de chamada de cjtw-fm?
 ###Tabelas: CREATE TABLE radio (radio_id AUTO_INCREMENT PRIMARY KEY, Frequency VARCHAR, Call sign VARCHAR, Location VARCHAR, Name / Format VARCHAR, Owner VARCHAR) CREATE TABLE singles:_12_9_titles_3_runners-up (singles:_12_9_titles_3_runners-up_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE overall_standings (overall_standings_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Name VARCHAR, Nationality VARCHAR, Total points VARCHAR, Oberstdorf (Rk) VARCHAR, Ga-Pa (Rk) VARCHAR, Bhofen#1 (Rk) VARCHAR, Bhofen#2 (Rk) VARCHAR) CREATE TABLE multiple_asian_games_gold_medalists (multiple_asian_games_gold_medalists_id AUTO_INCREMENT PRIMARY KEY, Athlete VARCHAR, Sport VARCHAR, Asian Games VARCHAR, Gold INT, Silver INT, Bronze INT, Total INT) CREATE TABLE list_of_protected_forests (list_of_protected_forests_id AUTO_INCREMENT PRIMARY KEY, Central Forest Reserve VARCHAR, Size in km² INT, Total plant species INT, Tree species INT, Endemic INT, Threatened (CR,VU,EN) INT)  
SELECT Location FROM radio WHERE Call sign = cjtw-fm